class Student {
    constructor(name, number) {
        this.name = name
        this.number = number
        // this.gender = 'male'
    }

    sayHi() {
        console.log(this)
        console.log(`姓名：${this.name}，学号：${this.number}`)
    }
}
const xialuo = new Student('夏洛',100)
console.log(xialuo.name)
console.log(xialuo.number)
xialuo.sayHi()